Idlewild received a starred review from Kirkus, a Book Sense 76 pick, and selection from both Borders and Barnes & Noble as one of the best science fiction/fantasy novels of the year. Neil Gaiman called it "absolutely fun, like a roller-coaster ride of fusion fiction" and "the kind of book you simply don't want to stop reading."

Edenborn continues the story from Idlewild, but can also be read as a standalone. SFX Magazine gave Edenborn a perfect five star review, declaring it "one of the best post-apocalyptic novels you will ever read." SF Crowsnest hailed Sagan as "an adrenaline shot straight into the heart of science fiction," while SF Site called the novel "elegant SF, dark and haunting, with characters who linger in memory long after the last page is turned."

Everfree is third in the series. Sci Fi Weekly praised it as "startlingly original" and "undeniably satisfying and triumphant." Kirkus: "Sagan's mind-blowing post-apocalyptic trilogy comes to a satisfying, terrifying conclusion." They go on to hail the book as "a powerful plea for sensible human cooperation delivered via a knockout story."